Machine for barking wood.



N. LOMBARD.

MACHINE FOR BABKING WOOD.

APPLICM'ION FILED MAY 6. I9l5.

Patented Apr. 15,1919.

4 SHEETS-SHEET l.

W %14 aflo'mae la S N. LOMBAR D.

MACHINE FOR BARKING WOOD.

APPLICATION FILED MAYG, I9I5.

Patented Apr. 15,1919.

4 SHEETS-SHEET 2.

WM nwoeo:

N. LOMBARD.

MACHINE FOR BARKING WOOD.

APPLICATION FILED MAY 6. 1915.

Patnted Apr. 15,1919.-

4 SHEETSSHEET 3- %it nmae/o v76 nvemkio N. LOMBARD.

MACHINE FOR BARKING WOOD.

APPLICATION FILED MAY 6, 1915.

' maimed A r. 15, 1919.

4 SHEETSSHEET 4.

Ell

wax web/om ITAL LOMBARD, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO INTER-NATIONAL PAPER COMPANY, A CORPORATION OF NEW YORK.

mncnmn FOR ,1: a

Application filed ma 0, mt. Serial No. 28,205.

' production-of pulp for the manufacture of paper; and the inventionconslsts of mechainism of improved form, characterized by the use voftwo cooperating series of rotary feeding wheels, which conjointly givesupport to-the' log, and which act in their ro-,

' tation to impart a rotary feeding movement o the same in an endwisedirection, to the end that'all-portionsof the enveloping bark may bepresented to the action of a bark removing element.

The invention is designed with special reference to a bark removingelement in the form of a fluid jet, and feeding wheels and theiradjunctive parts being formed and arranged to present the log in themost favorable position for effective action by the fluid jet, whichlatter is of such size and under such pressure that its impingement onthe enveloping bark will act to completely remove the same.

It will be understood however, that my .3 invention is not. necessarilylimited in its application in connection with a bark removing element ofthis particular character, but maybe employed also with other forms ofbark removing means, such as blades, cutters, and the like. Further, itwill be understood that various changes in the detailed form andconstruction of the mechanism may be made by the skilled mechanic,without departing om the limits of my invention; and it will beunderstood that the invention is not limitedto any particular form orconstruction of the parts except in so far as such limitations arespecified in the claims. In the accompanying drawings:

Figure 1 is an end elevation of my improved machine certain parts beingbroken away to exg clise other parts to view.

'g. 2 is a side elevation of the same with certain parts omitted.

Fig.3 is a top plan view of my improved machine.

. Specification of Letters Patent. Patented Apr. ll5,19ll9,

Fig. 4 is a longitudinal section through one of the feeding wheels andits driving pinion.

Fig. 5 is an elevation partly in section of the driving pinion for oneof the feeding wheels.

Fig. 6 is a longitudinal section through the same on the line b-b ofFig. 5.

Referring to the drawings:

The operative parts ofmy machine are mounted in and sustained by a frame1 of appropriate and suitable form and material. In the present instancethis frame consists of two end uprights 2, connected fixedly at theirlower ends to the ends of two horizontal transverse sills 3, andconnected to gether between their ends by upper and lower longitudinallyextending beams 4 and 5 and an intermediate beam 6, the two horizontalsills 3 being likewise connected to gether between their ends by meansof two longitudinally extending sills 7 and 8, this constructionproducing a rigid and strong frame structure well adapted to ive supportto the operative parts of the mec anism now to be described.

Sustained by the frame in the specific manner more particularlydescribed here inafter, is an upper series of rotary feeding wheels 9which are arranged side by side, there being in the present instancefive wheels in the series. Also sustained by said frame as morespecifically described later is a lower series of feeding wheels 10,corresponding in number to that of the upper series, and arranged sideby side so as to cooperate with the wheels of the upper series inconjointly giving support to the log 11 which is to be barked. The twoseries of Wheels are so disposed relatively that on being rotated in thesame direction, the supported log will be rotated about its axis andwill at the same timebe fed endwise, and in this manner will bepresented to the action of the bark removing element, in the presentinstance in the form of a fluid jet 12 of sufficient size and under suchpressure that it will act to loosen, break up, and remove the barkprogressively from one end of the log to the other.

The said feeding wheels, in order that they will impart the describedfeeding move ment to the log, are constructed, mounted and operated inthe manner now to be described, and as the individual wheels are of thesame detailed construction, a descripimparted thereto as presentlydescribed.

The axle 14 is sustained in the inner ends of' two horizontal bracketarms 17 and 18, which extend on opposite sides of the wheel and arefirmly fixed at their outer ends to the two frame beams 5-and 6, asshown more par ticularly in Fig. 1. The bracket arms for the severalwheels of the upper series are so positioned that the sustaining axles14 will all be disposed in a common vertical plane, but will be inclineddownwardly from the horizontal, with the result that the planes of thewheels will be dlsposed at a like inclination, the purpose of whlcharrangement is to cause the wheels in their rotation, to impart afeeding movement to the log endwise. The gear rings 15 are inclosed ingear casings 19, which latter are connected at their centers to andsustained by the respective bracket arms 18.

The feeding wheels of the lower series are likewise provided on theirrims with pointed pins or spurs 20 to grip the log, and. the wheels aremounted respectively on short axles 21. sustained in the upper ends ofbracket arms 22 and 23, extending on opposite sides of the wheels andfixed at their lower ends to the longitudinal frame sills 7 and 8, gearrings 24 being fixed respectively to the sides of the wheels for drivingthem, and the said gear rings being inclosed by gear casings 25connected to and sustained at their centers by the respective bracketarms 23. The bracket arms are so positioned that the sustaining axles 21will all be disposed in a common horizontal plane, but will be inclinedlaterally relative to the direction of feed. Their axles 21 are disposedat a lower level than the axles of the upper series of wheels and thediameters of the.

wheels of the two series, and the horizontal distance between theiraxes, is such that the .wheels of the two series will overlap slightly.In other words, the paths of the movement of the wheels of one serieswill intersect the paths of the movement of the wheels of the otherseries. By reason of this relation of the two series of wheels to eachother, they will conjointly support the log as shown in Fig. 1, and onmotion being imparted to the wheels in the direction of the arrows, thatis, with the wheels traveling in the same direction, the adjacent sidesof the wheels where they engage the log, will travel in oppositedirections, with the result that the log will be given a motion ofrotation about its longitudinal axis and due to the relative inclinationof t e axes of the two series of wheels, the log will have imparted toit an endwise movement, these combined movements resulting in alspiralrotary movement of the log in an endwise direction. Due to the fact thatboth series of wheels are inclined relatively to the direction of feed,their cooperative action on the log in imparting an endwise movement tothe same, is more pronounced, uniform and certain than if but one set ofwheels was inclined.

Rotary motion is imparted to the upper series of wheels by means of ahorizontal driving shaft 26 extending above the wheels and mounted forrotation in bearings 27 on the inner ends of horizontal arms 28 whichextend outwardly and are fixed to the frame beam 6, there being in thepresent instance four of these hearings supporting the shaft atintervals. This shaft gives support and imparts its rotary motion to aseries of pinions 29 which are located on the shaft at intervalscorrespondingto the location of the respective feeding wheels, inposition to mesh with the respective gear rings 15. The pinions 29 arefrictionally attached to the shaft so that they will yield or slipindependently of each other when subjected to undue strain, the purposeof this, construction being to provide for an independent give oryielding of the feeding wheels in their action-on the log, so that thesurface speed of the wheels will accommodate themselves to the surfacespeed of that particular portion of the log on which they may for thetime being be acting. In other words, as the logs vary in diameter inrespect to different points in their length, the surface speeds at thesedifferent points are necessarily diflerent, and if the feeding wheelswere all driven positively and unvaryingly at the same surface speed,certain of the wheels would be subjected to dangerous strains. Or if theendwise movement of the log were checked, the continued rotation of thewheels would subject them to severe strain. By mounting the wheels sothat a given degree of resistance to their rotation will cause them toyield relatively to the driving shaft, all of the wheels will engage thelog without motion relative thereto, and without being subjected toinjurious strains. In Figs. 5. and 6, I have shown one form of means forthus mounting the pinions frictionally on their carrying shaft, whichwill answer the purposes in view. It will be manifest, however, thatother forms of connection between these parts may be adopted withoutdeparting from the spirit of the invention. On reference to thesefigures it will be seen that the shaft and is provided with an axiallyextending casing 31 forming chambers or spaces 32 at diametricallyopposite sides of the shaft. In these chambers are mounted pressureblocks 33 preferably of fibrous material such as wood, which blocks areconcaved at their inner adjacent ends so as to embrace the shaft, andare mounted to slide radially relatively to the shaft. These blocks areacted on by s rings 34 mounted between the outer ends 0 the blocks andthe walls of the casing, the action of the sprin s being to urge theblocks inwardly with su cient pressure to set up the requisite amount offriction between them and the shaft to cause the latter to drive thepinions with suflicient force to rotate the log. The tension of thesprings, however, is such that when the feeding Wheel is subjected toundue strain, the pinions willsli' on the shaft and will cease to impartmotion to the feeding wheel. The tension of the springs may be adjustedby means of set screws 35 threaded in the walls of the casing, andhaving their inner ends in position to engage the leaf spring. 1

The feeding wheels of the lower series 1.0 are driven from a horizontaldriving shaft 36 extending at the front of the feeding wheels andmountedin bearings 37 on the upper ends of vertical standards 38, whose lowerends are fixed to the frame sill 7, there being in the present instancefour of these hearings giving support to the shaft at intervals in itslength. This shaft gives support and imparts its rotary motion to aseries of pinions 39 which are located on the shaft at intervalscorresponding to the location of the respective feeding Wheels of thelower series and in position to mesh with the respective gear rings 24.These pinions are frictionally connected with their carrying shaft inthe same manner described in con: nection with the pinions for the upperseries of wheels, the plnions 39 loosely encircling the shaft 26 andbeing provided with casings 40 containing pressure blocks 41 acted on byleaf springs 42 controlled as to their tension by set screws 43.

The driving shafts 26 and 36 are provided at their ends with drivingpulleys 26 and 36 respectively, by means of which rotary motion isimparted to the shafts from an overhead main driving shaft 42 extendinghorizontally above the feeding wheels and mounted in suitable bearings(not shown), the said shaft 42 having fixed to it, pulleys 43and 44, thelatter being of greater diameter than the former. A driving belt 45 ispassed around pulley 26 and pulley 43, and a driving belt 46 is passedaround pulley 36 and pulley 44, whereby the rotary motion of the maindriving shaft 42 will be imparted to the two shafts 26 and 36 but atrelatively diflerent speeds, the shaft 36 at a higher rate of speed thanthe shaft 26, with the result that the lower series of feeding wheelswill be rotated faster than the other series.

The purpose of thus driving the two series of feeding wheels atdifferent speeds is to malntaln the log in its proper position againstthe upper series of wheels, the action of the faster moving lower wheelsbeing in effect to push the log back against the othe wheels.

The logs to be operated on are supported side by side on a feeding table47 situated at the front of the machine and inclining downwardly in suchposition that the logs will successively roll by ravity from the feedingtable and enter within the grip of the two series of wheels as shown inFig. 1. The discharge end of the table is equipped with a stop device inthe form of a pair of rotary star wheels 48 fixed to a horizontal shaft49 mounted in bearings on the table and adapted to be partially rotatedintermittently by means of a hand Wheel 50 fixed to the shaft. The formof the star wheel and its relation to the sustaining surface of thetable is such that it will successively form a seat or rest for thelowermost logs as the latter advance in succession to the delivery endof the table. After the log being acted on by the feeding wheels hasbeen advanced endwise out of the path of the next log to be enteredwithin the wheels, the hand wheel 50 is turned a partial revolution soas to release the next log to allow it to pass to the action of thefeeding wheels, this motion of the hand wheel causing the star wheels totake a position where they will arrest the next log. By this means, thelogs may be successively fed to the action of the machine, withoutdanger of their colliding or interfering with each other. In order thatthe logs supported by the feeding wheels may be maintained in engagementwith the spurs or teeth so as to insure the hold of the wheels on thelog and the proper feed of' the latter, I provide one or more pressuredevices, in the form of vertical rollers 51 carried on the ends ofvertically movable arms 52 pivoted at their outer ends as at 53 to theupper frame beam 4. These rollers are in position to rest upon the uppersurface of the log, as the latter is supported by the feeding wheels,and the weight of the arms and attached parts is such that the log willbe held with suflicient pressure against the wheels to insure the roperengagement of the teeth therewith. hese pressure devices are arranged atsuch intervals in the length of the machine, that after a log has beenadvanced sulficiently to be free from the pressure of the first pressuredevice, it may be acted on by the second, this arrangement insuring thatthe logs be maintained in proper engagement with the and be advancing atthe same" time.

wheels, 'otwithstanding the fact that two or more lbgs may be supportedby the wh ie ells e pressure devices are mounted for independ-- entmovement into and out of engagement with thelogs and are adapted to bemanually controlled in the present instance by means of cords or ropes54 attached at one end to the respective arms, and assing upwardly overguide pulleys 55 Suite. ly sustained, and then downwardly within reachof the attendant.

The operation of the machine is as follows: Motion being imparted to thefeeding wheels as described, the attendant, by the operation of the handwheel 50, releases the logs in succession, and they roll successivelywithin the grip of the Wheels. The rotation of the wheels turns the logsabout their longitudinal axes and at the same time advances them endwiseone after another, the pressure devices bearing on the logs andmaintaining them in proper engagement with the wheels. All portions ofthe surface of the logs thus fed, are presented to the action of thebark removing element 12, re-

. sulting in the effectual removal of the bark progressively from oneend of the logs to the other, the logs finally leaving the machinecleanly stripped of bark.

Having thus described my invention, what I claim is: y

1. In a machine for barking wood, the combination of two cooperatingseries of feeding wheels to advance the log endwise, the wheels of oneseries being mounted for rotation on axes inclined from the horizontal,and the wheels of the other series being mounted on horizontal axesinclined relatively to the direction of feed.

2. In a machine for barking wood, the combination of two coiiperatingseries of feeding wheels to advance the log endwise, the wheels of oneseries being mounted for rotation on axes disposed in a vertical planebut inclined from the horizontal, and the wheels of the other seriesbeing mounted for rotation on axes disposed in a horizontal, plane butinclined at an angle relatively to the direction of feed.

signature.

3. In a machine for barking wood, the combination of an upper series ofrotary feeding wheels, a lower co'ciperating series of rotary feedingwheels, said two series of wheels adapted to conjointly support the logand acting in their rotation to feed the same endwise, and means forrotating the lower series of wheels at a higher rate of speed than theupper series to cause the log to be pushed back and maintained againstthe upper series of feeding wheels.

4:. In a machine for barking wood, the combination of a series of rotaryfeeding wheels adapted to engage the log at intervals in its length andacting to both rotate the log and feed the same endwise, and means forrotatin the wheels, the said wheels being yielda le independently in thedirection of rotation.

5. In a machine for barking wood, the combination of a series of rotaryfeeding wheels arranged side by side and adapted to engage the log atintervals in its length and acting in their rotation to both rotate thelog and feed the same endlwise, driving means common to all of saidwheels, and independently yielding driving connections between thedriving means and the individual wheels.

6. In a machine for barking wood, the combination of a rotary feedingwheel adapted to engage the log and acting by its rotation to impart afeeding movement to the same, gear teeth on said wheel, a driving shaft,and a pinion frictionally engaged with the driving shaft and meshingWith said gear teeth.

7. In a machine for barking wood, the combination of a series of rotaryfeeding wheels arranged side by. side and adapted to engage the log atintervals in its length and acting in their rotation to impart a feedingmovement thereto, gear rings on the respective wheels, a driving shaftcommon to all of the said wheels, and driving pinions frictionallyengaged with the shaft and meshing with the respective gear rings.

In testimony whereof, I have affixed my NATHANIEL LOMBARD.

